You can customize the Toolbar part of Photoshop a few different ways.
Moving the Toolbar: To move the Photoshop CC 2018 Toolbar to another location on your screen, click on the series of vertical lines (located at the top of the Toolbar) and drag the toolbar to another part of the screen. This action un-anchors the Toolbar from its default location.
Using columns: If you prefer the Photoshop CC 2018 Toolbar to be two columns instead of one, click on the two triangles at the very top of the Toolbar. Clicking on the triangles again will toggle the Toolbar back to a single column.
Add/remove tools: If there are CC 2018 Photoshop tools that are missing from the Toolbar, or if you want to customize the tools visible in the Toolbar, click on the three little dots located at the bottom of the Toolbar, just above the squares showing the foreground and background colors.
If tools have been removed from the Photoshop CC 2018 Toolbar, they will show in a dropdown once you click on these dots.
If your Toolbar is at its default setting, the only option will be Edit Toolbar. Click on Edit Toolbar to open the Customize Toolbar window.